# Add the ARM CONTEXTIDR_EL2 miscreg.
def upgrader(cpt):
    if cpt.get("root", "isa", fallback="") == "arm":
        for sec in cpt.sections():
            import re

            # Search for all ISA sections
            if re.search(r".*sys.*\.cpu.*\.isa$", sec):
                miscRegs = cpt.get(sec, "miscRegs").split()
                # CONTEXTIDR_EL2 defaults to 0b11111100000000000001
                miscRegs[599:599] = [0xFC001]
                cpt.set(sec, "miscRegs", " ".join(str(x) for x in miscRegs))


legacy_version = 14
